JPH08320369A - Gps receiver - Google Patents

Abstract

PURPOSE: To prevent the screening of a radio wave due to, for example, the head of a user by setting the gravity position of a planar antenna part to a lower side in vertical direction from the rotary center of oneself and pinching the antenna part from both skies with a support member. CONSTITUTION: A case 10 for encasing a planar antenna part 1 and a reception part 11 is supported so that it can be rotated by two support shafts 13 and the support shafts 13 are fixed to a support member 5 with two arm parts 5A. The member 5 is fixed to the operation part 3 with a screw 9, the antenna part 1 and the operation part 3 are connected, and a wave reception surface 1A can be rotated around the shaft of the support shaft 13 for a horizontal surface. A weight 17 is provided at the lower side of the case 10 and the position of the support shaft 13 is set higher than the gravity position of the case 10 including the antenna part 1 and the reception part 3. When a user sets the operation part 3 to a proper position, the wave reception surface 1A rotates in parallel with a horizontal surface H due to the dead weight of the antenna part 1. The operation part 3 is located at the lower side of the antenna part 1 and a radio wave cannot be screened due to, for example, the head of a user.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a GPS receiver suitable for guiding to a destination.

[0002]

2. Description of the Related Art GPS (Global Positioning System)
In the receiving device, for example, when the yacht is navigating, the user's current position, the direction to the destination, the distance, etc. are displayed to the user, and generally by receiving the radio waves transmitted from three to four artificial satellites, Various data are calculated and displayed.

It is known that an antenna for receiving radio waves from an artificial satellite is provided with a helical type antenna on the side surface of the device or is incorporated in the device.

Further, since the antenna may be fixed to the hull of a yacht, for example, when the yacht travels on the heel, the antenna is tilted by the heel angle.

[0005]

However, if an antenna is provided on the side surface of the device, radio waves are blocked by the user's head and radio wave interference due to the presence of the operation unit (including the display unit) occurs. It may be difficult to perform good reception.

Further, even when the antenna is built in, when the user looks at the display unit, for example, there is a possibility that radio waves may be blocked by the head or the like, or radio waves may be disturbed by the operation unit.

Further, when the heel angle is, for example, 20 degrees, even if the antenna characteristic has a gaze with an attack angle of 20 degrees or more, reception from an artificial satellite with an attack angle of 40 degrees or less cannot be obtained. An object of the present invention is to provide a GPS receiving device capable of good reception by not blocking the radio waves by the user's head or the like, preventing radio wave interference by the operation unit, and keeping the antenna unit always horizontal. To provide.

[0008]

In the GPS receiver of the present invention, the plane antenna section and the operation section are integrated by a supporting member whose wave-receiving surface of the plane antenna section is rotatably supported by a desired angle with respect to a horizontal plane. Of the planar antenna part, the center of gravity of the planar antenna part is set vertically below the center of rotation of the planar antenna part, and the support member holds the planar antenna part from both sides. Is.

In such a GPS receiver of the present invention, since the wave-receiving surface of the plane antenna section is sandwiched from both sides of the plane antenna section by the supporting member so as to be rotatable at a desired angle with respect to the horizontal plane, the head of the user, etc. As a result, radio waves to the receiving surface are not disturbed.

Further, by setting the center of gravity of the plane antenna section vertically below the center of rotation of the plane antenna section, the wave receiving surface of the plane antenna section is always maintained in a horizontal posture.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of a GPS receiver according to the present invention will be described below with reference to the drawings. In FIG. 1 and FIG. 2 showing the arrow II in FIG. 1, the planar antenna unit 1 is a circular planar antenna, and the receiving unit 11 is provided on the lower side (the side opposite to the wave receiving surface 1A).

In this case, the planar antenna section 1 and the receiving section 11
Is housed and integrated in the disk-shaped case 10, and the output signal from the receiving unit 11 is input to the operation unit 3 via the connector unit 7.

The operation section 3 is provided with a display section 3A such as a liquid crystal display and various operation button groups 3B.
The operation button group 3B includes a power button and buttons for selecting display contents to be displayed on the display unit 3A.

In this embodiment, as understood from FIG. 2, the operation surface 3 provided with the operation button group 3B.
Since a is formed in a wavy shape, safety is ensured so that the operation button group 3B is not pressed when the operation surface 3a is brought into contact with a desk or the like.

The case 10 accommodating the planar antenna section 1 and the receiving section 11 is rotatably supported by the two support shafts 13 and 13 at the radial position thereof. 13 is fixed to a U-shaped support member 5 having two arm portions 5A and 5A.

Further, the supporting member 5 is detachably fixed to the operating portion 3 with a screw 9, so that the planar antenna portion 1 is provided.
The operation unit 3 and the operation unit 3 are connected and integrated via a support member 5, and the plane antenna unit 1 is such that the wave receiving surface 1A is rotatable about the horizontal plane about the axes of the support shafts 13 and 13 by a desired angle. You can

Here, as understood from FIG. 3, a weight (balancer) 17 is provided below the case 10.
The positions of the support shafts 13 and 13 are set to be higher than the center of gravity of the case 10 (including the planar antenna unit 1 and the receiving unit 11) in the vertical line V direction.

Therefore, when the user puts the operating portion 3 into an appropriate posture, the flat antenna portion 1 (case 10) is always liable to the horizontal plane H and the wave receiving surface 1 due to its own weight and the weight of the weight 17.
Rotate so that A becomes parallel.

As described above, in this embodiment, the operating portion 3 and the flat antenna portion 1 are connected by the support member 5, and the flat antenna portion 1 rotates about the axes of the support shafts 13, 13. The wave receiving surface 1A can be made parallel to the horizontal plane H.

The receiving unit 11 is arranged below the planar antenna unit 1, and the operating unit 3 is located below the planar antenna unit 1 even when the operating unit 3 is placed in a posture that is easy for the user to use. Since it is located at, the radio wave is not blocked by the user's head or the like, and the radio wave interference or the like due to the presence of the operation unit 3 is avoided, and good reception can be performed.

Further, the position of the center of gravity of the case 10 corresponds to the support shaft 1.
By setting below the axial position of 3 and 13,
Since the horizontal attitude of the planar antenna unit 1 is automatically maintained, it is easy to use.

Further, since the support member 5 can be separated from the operating portion 3, as can be understood from FIG. 4, the support member 5 is fixed to the hull 2 of the yacht via the attachment part 15 so as to be flat. By installing the antenna unit 1, the operation unit 3 can be operated in a place that is easier to use according to the usage situation, and the planar antenna unit 1 can be placed at a better reception position.
Can be set.

The weight 17 provided on the lower surface of the case 10 on the receiving portion 11 side is not always necessary, and the use of the weight 17 allows the planar antenna portion 1 to be maintained horizontally.

Further, since the planar antenna unit 1 is rotatably supported also in the direction orthogonal to the support shaft 13, the member for supporting the planar antenna unit 1 is stable horizontally even when tilted in various directions. The posture is maintained.

Further, as the planar antenna unit 1, for example, a rectangular antenna other than a circular antenna can be used.

[0026]

As can be understood from the above description, in the GPS receiving apparatus according to the present invention, the wave receiving surface of the flat antenna portion is supported so as to be rotatable by a desired angle with respect to the horizontal plane.
There is an advantage that the radio wave to the receiving surface is not disturbed by the user's head or the like.

Further, according to the present invention, since the position of the operating portion in the vertical direction is set below the plane antenna portion, there is no shielding of the radio wave by the head of the user, and the radio wave by the operating portion is not blocked. Since the obstacle is reduced, there is an advantage that a good reception is possible.

Further, according to the present invention, the position of the center of gravity of the planar antenna section is set vertically below the center of rotation of the planar antenna section, so that the receiving surface of the antenna section is always maintained in a horizontal posture. This also has the benefit of better reception.

[Brief description of drawings]

FIG. 1 is a front view of a preferred embodiment of a GPS receiver according to the present invention.

FIG. 2 is a side view showing an arrow II in FIG.

FIG. 3 is an explanatory diagram showing a usage state.

FIG. 4 is an explanatory diagram showing another usage state.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 antenna part, 1A wave receiving surface, 3 operation part, 5 supporting member, 5A arm part, 11 receiving part, 13 supporting shaft, 17
weight

Claims (1)

[Claims] 1. A flat antenna part in which the wave receiving surface is rotatably supported by a desired angle with respect to a horizontal plane so that the flat antenna part and the operating part can be integrally connected to each other. A GPS receiving device characterized in that the center of gravity of the plane antenna section is set below the center of rotation of the plane antenna section in the vertical direction, and the support member holds the plane antenna section from both sides.